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    • 1. 发明专利
    • Composite magnetic particle and composite magnetic material
    • 复合磁性颗粒和复合磁性材料
    • JP2005085967A
    • 2005-03-31
    • JP2003316082
    • 2003-09-08
    • Fuji Electric Holdings Co Ltd富士電機ホールディングス株式会社
    • EDO MASAHARUOKUDA SANEHIROUCHIDA SHINJIOKAMOTO KENJI
    • H01F1/33
    • PROBLEM TO BE SOLVED: To provide a composite magnetic material capable of establishing the compatibility between a high permeability and a high resistivity in a high-frequency region.
      SOLUTION: A metallic material coating film 32 is coated on the surface of metallic magnetic particles 31, and further the surface is coated by a ferrite coating film 33 being an oxide magnetic coating film. By providing the metallic material coating film 32 between the ferrite coating film 33 and the metallic magnetic particles 31 can suppress the diffusion of oxygen from the ferrite coating film 33 to the metallic magnetic particles 31 at sintering of the composite magnetic particles, thereby avoiding reduction in the resistivity of the ferrite coating film 33 due to oxygen deficiency of the ferrite coating film 33, having conventionally been caused at sintering at a high temperature of 400°C or over, and reduction in the insulation performance among the compound magnetic particles. Moreover, since the composite magnetic particles, after the sintering, are bonded via a ferrite bond region 35 with a wide contact area, a high permeability can be maintained.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供能够在高频区域中建立高磁导率和高电阻率之间的相容性的复合磁性材料。 解决方案:在金属磁性颗粒31的表面上涂覆金属材料涂膜32,并且还用氧化物磁性涂膜的铁氧体涂层33涂覆表面。 通过在铁氧体涂覆膜33和金属磁性颗粒31之间设置金属材料涂膜32,可以抑制在复合磁性颗粒烧结时氧从铁素体涂层膜33向金属磁性颗粒31的扩散,从而避免了 由铁氧体涂膜33的缺氧导致的铁氧体涂膜33的电阻率,通常是在400℃以上的高温烧结时引起的,并且复合磁性粒子之间的绝缘性能降低。 此外,由于复合磁性颗粒在烧结之后通过具有宽接触面积的铁氧体结合区域35结合,所以可以保持高磁导率。 版权所有(C)2005,JPO&NCIPI
    • 8. 发明专利
    • Magnetic member and method for manufacturing same
    • 磁性构件及其制造方法
    • JP2005142514A
    • 2005-06-02
    • JP2003380458
    • 2003-11-10
    • Fuji Electric Holdings Co Ltd富士電機ホールディングス株式会社
    • UCHIDA SHINJIOKAMOTO KENJIEDO MASAHARUOKUDA SANEHIRO
    • B22F1/02B22F3/00H01F1/33H01F41/02
    • PROBLEM TO BE SOLVED: To provide a low-loss magnetic member which has superior magnetic permeability and saturated magnetism strength even in a high frequency band, and to provide its manufacturing method.
      SOLUTION: An NiZn ferrite coating of 0.5 μm in mean thickness is formed on the surface of a spherical permalloy particle of 20 μm in diameter by an ultrasonic excitation ferrite plating method and powder of compound magnetic particles is pressed into a core. This core is dipped in a reaction solution prepared by mixing a mixed solution of FeCl
      2 , NiCl
      2 , and ZnCl
      2 , an oxidizer NaNO
      2 , and a pH control agent NH
      4 OH (for 30 minutes at a reaction solution temperature of 60°C) to replate the core 37. The core 37 which is thus obtained has metal magnetic particles 11 bonded together across bonding parts 14 of the ferrite coating without coming into direct contact with each other, so the degree of bonding between magnetic particles 11 can be made small while magnetic bonding between ferrite coating metal magnetic particles is maintained.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:即使在高频带中也提供具有优异的磁导率和饱和磁强度的低损耗磁性部件,并提供其制造方法。 解决方案:通过超声波激发铁素体电镀法在直径为20μm的球形坡莫合金颗粒的表面上形成平均厚度为0.5μm的NiZn铁氧体涂层,并将复合磁性颗粒的粉末压制成芯。 将该芯浸渍在通过混合FeCl 2 SBI,NiCl SB 2和SBCl 2 SB SB的混合溶液和ZnCl 2 SB SBB 2混合溶液制备的反应溶液中, SB> 2 和pH调节剂NH 4 S(反应溶液温度为60℃30分钟),从而重新制备核心37.由此得到的核心37 具有将金属磁性粒子11粘合在铁素体涂层的接合部14上而不直接接触的状态,因此可以使磁性粒子11之间的接合程度小,同时保持铁氧体涂覆金属磁性粒子之间的磁性接合。 版权所有(C)2005,JPO&NCIPI